What is the question? You did not write a question
Answer:
B. an artist's rendering of the Gutenberg printing press
Explanation:
<u>As the passage is clearly about how Gutenberg's first printing press worked, an artist's rendering of the machinery</u> which is such an important invention would be very useful in understanding how it works.
<u>the paragraph is pictorial and descriptive</u> and hence would greatly benefit from an illustration that provides visual aid for the workings of the complex machinery that is described in detail in the text.
The underlined word of the sentence which "conclusive" would have a denotation of "impossible to disprove" as it is used in the sentence. Furthermore, a denotation is the "literal" meaning of a word or some may refer to it as the "dictionary definition or meaning."